$ git clone -n https://src.fedoraproject.org/rpms/emacs-f.git /var/lib/mock/f39-build-1465506-33590/root/chroot_tmpdir/scmroot/emacs-f
Cloning into '/var/lib/mock/f39-build-1465506-33590/root/chroot_tmpdir/scmroot/emacs-f'...
$ git fetch origin 7229cbe9a4cd28339be99f1d2d247452b3a87bb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-f
 * [new ref]         7229cbe9a4cd28339be99f1d2d247452b3a87bb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7229cbe Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild